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Citation: Zhi-liang Wang, Jia-li Xu, Qian Yuan, Mahmoud H. M. A. Shibraen, Jian Xu, Shu-guang Yang. Hydrothermal Treatment of Polyamide 6 with Presence of Lanthanum Chloride[J]. Chinese Journal of Polymer Science, ;2016, 34(4): 399-406. doi: 10.1007/s10118-016-1764-x shu

Hydrothermal Treatment of Polyamide 6 with Presence of Lanthanum Chloride

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State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
2.
Lab of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Corresponding author: Shu-guang Yang,
Received Date: 17 September 2015
Revised Date: 5 November 2015

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 51373032), Innovation Program of Shanghai Municipal Education Commission, and Fundamental Research Funds for the Central University and DHU Distinguished Young Professor Program. Z. W. thanks financial support from Chinese Universities Scientific Fund (No. CUSF-DH-D-2014025). Thank Prof. Wusong Jin, College of Chemical Engineering, Donghua University, for MALDITOF- Mass measurement.

Hydrothermal processing of polyamide 6 (PA6) with the presence of lanthanum chloride (LaCl3) was studied in the temperature region from 160℃ to 250℃. PA6 will be dissolved in the superheated water when temperature is above 160℃. And as PA6 is dissolved, hydrolysis will happen, which makes PA6 chains degrade. By adding LaCl3 in the hydrothermal environment, the PA6 hydrolysis will intensify, especially when the hydrothermal temperature is higher than 200℃. When the hydrothermal system cools down, the hydrolyzed PA6 segments will crystallize from the solution or remain dissolved in the solution depending on molecular weight. In addition, the hydrolyzed compound of LaCl3 would affect the crystallization of PA6 segments with proper size, and phase would be presented.
- Nylon 6,
- Hydrolysis,
- Hydrothermal processing,
- Crystallization
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